Magnetic integrated inversion inductor

Abstract

The utility model relates to the technical field of inductors, in particular to a magnetic integrated inversion inductor which comprises an upper iron yoke and a lower iron yoke. The upper iron yoke is provided with a first upper extension arm, a second upper extension arm and a third upper extension arm which have the same length on the same plane; the included angle between the first upper extension arm and the second upper extension arm, the included angle between the second upper extension arm and the third upper extension arm and the included angle between the third upper extension arm and the first upper extension arm are equal; the lower iron yoke is provided with a first lower extension arm, a second lower extension arm and a third lower extension arm which have the same length on the same plane; the included angle between the first lower extension arm and the second lower extension arm, the included angle between the second lower extension arm and the third lower extension arm and the included angle between the third lower extension arm and the first lower extension arm are equal. According to the utility model, the three independent inductors are integrated into one integral combined inductor, so that the material cost, the weight and the required installation space are obviously reduced, and the photovoltaic inverter is more compact, miniaturized and light.

Description

Technical Field

[0001] The utility model relates to the technical field of inductors, in particular to a magnetically integrated inverter inductor. Background Art

[0002] A photovoltaic inverter is a key device in a photovoltaic power generation system. Its function is to convert the direct current (DC) generated by photovoltaic panels into alternating current (AC) and feed it into the power grid. In a photovoltaic inverter, the DC-to-AC conversion process primarily relies on the inverter inductor.

[0003] Currently, photovoltaic inverters typically use three independent inverter inductors to convert DC power into three-phase AC power. Each inverter inductor is independently located and consists of two cores, which not only takes up a lot of space but also increases overall system cost. This traditional solution has significant shortcomings in practical applications, especially as grid-connected photovoltaic power generation faces increasingly stringent cost and size requirements.

[0004] In addition, three independent inverter inductors are placed together, and multiple independent inductors will cause electromagnetic interference and energy loss, affecting the conversion efficiency and reliability of the system. Utility Model Content

[0005] The purpose of the utility model is to provide a magnetically integrated inverter inductor in view of the above-mentioned deficiencies in the prior art.

[0006] The purpose of the utility model is achieved through the following technical solutions: A magnetically integrated inverter inductor comprises an upper iron yoke and a lower iron yoke;

[0007] The upper iron yoke is provided with a first upper extension arm, a second upper extension arm and a third upper extension arm of the same length on the same plane; one end of the first upper extension arm, one end of the second upper extension arm and one end of the first upper extension arm are connected to each other; the angle between the first upper extension arm and the second upper extension arm, the angle between the second upper extension arm and the third upper extension arm, and the angle between the third upper extension arm and the first upper extension arm are equal;

[0008] The lower iron yoke is provided with a first lower extension arm, a second lower extension arm and a third lower extension arm of the same length on the same plane; one end of the first lower extension arm, one end of the second lower extension arm and one end of the first lower extension arm are connected to each other; the angle between the first lower extension arm and the second lower extension arm, the angle between the second lower extension arm and the third lower extension arm, and the angle between the third lower extension arm and the first lower extension arm are equal.

[0009] The utility model is further configured such that a first core column is provided between the other end of the first upper extension arm and the other end of the first lower extension arm; a second core column is provided between the other end of the second upper extension arm and the other end of the second lower extension arm; and a third core column is provided between the other end of the third upper extension arm and the other end of the third lower extension arm.

[0010] The first core leg, the second core leg and the third core leg are respectively wound with coils.

[0011] The present invention is further configured such that the upper iron yoke is arranged in parallel with the lower iron yoke; the first core column is arranged perpendicular to the upper iron yoke; and the first core column, the second core column and the third core column are arranged in parallel.

[0012] The present invention is further configured such that the first core column, the second core column and the third core column are made of metal magnetic powder cores.

[0013] The present invention is further configured such that the metal magnetic powder core is iron-silicon alloy powder, iron-silicon-aluminum alloy powder, iron-nickel alloy powder, amorphous powder and / or nanocrystalline powder.

[0014] The present invention is further configured such that the coil is made of copper and / or aluminum.

[0015] The present invention is further configured such that the cross-sectional shape of the first core column, the cross-sectional shape of the second core column and the cross-sectional shape of the third core column are circular, square, racetrack, triangular or elliptical.

[0016] The present invention is further configured such that a middle core column is provided between the connection between the first upper extension arm, the second upper extension arm and the third upper extension arm and the connection between the first lower extension arm, the second lower extension arm and the third lower extension arm.

[0017] The present invention is further configured such that the middle core column is made of iron-based amorphous strip, iron-based nanocrystalline strip, manganese-zinc ferrite or silicon steel alloy.

[0018] The present invention is further configured such that the cross-sectional shape of the central core column is circular, square, racetrack, elliptical, triangular or annular.

[0019] Beneficial effects of the utility model:

[0020] 1. By integrating three independent inductors into a combined inductor, the material cost, weight and required installation space are significantly reduced, making the photovoltaic inverter more compact, miniaturized and lightweight.

[0021] Second, the design of the combined inductor simplifies the manufacturing and assembly process, reduces material and labor costs, and thus reduces the cost of the overall system.

[0022] 3. The combined inductor design optimizes electromagnetic characteristics, reduces electromagnetic interference and energy loss, and improves power conversion efficiency and system reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the utility model. A person skilled in the art can obtain other drawings based on the following drawings without making any creative effort.

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the utility model from another perspective;

[0026] Figure 3 This is a schematic diagram of the structure of the utility model after the coil is hidden;

[0027] Figure 4 This is a magnetic line simulation diagram of the utility model;

[0028] Among them: 1. Upper iron yoke; 11. First upper extension arm; 12. Second upper extension arm; 13. Third upper extension arm; 2. Lower iron yoke; 21. First lower extension arm; 22. Second lower extension arm; 23. Third lower extension arm; 31. First core column; 32. Second core column; 33. Third core column; 4. Coil; 5. Middle core column. DETAILED DESCRIPTION

[0029] The present invention will be further described with reference to the following embodiments.

[0030] Depend on Figures 1 to 4It can be seen that the magnetically integrated inverter inductor described in this embodiment includes an upper iron yoke 1 and a lower iron yoke 2; the upper iron yoke 1 is provided with a first upper extension arm 11, a second upper extension arm 12 and a third upper extension arm 13 of the same length on the same plane; one end of the first upper extension arm 11, one end of the second upper extension arm 12 and one end of the first upper extension arm 11 are connected to each other; the angle between the first upper extension arm 11 and the second upper extension arm 12, the angle between the second upper extension arm 12 and the third upper extension arm 13 and the angle between the third upper extension arm 13 and the first upper extension arm 11 are connected to each other; 13 is equal to the angle between it and the first upper extension arm 11; the lower iron yoke 2 is provided with a first lower extension arm 21, a second lower extension arm 22 and a third lower extension arm 23 of the same length in the same plane; one end of the first lower extension arm 21, one end of the second lower extension arm 22 and one end of the first lower extension arm 21 are connected to each other; the angle between the first lower extension arm 21 and the second lower extension arm 22, the angle between the second lower extension arm 22 and the third lower extension arm 23, and the angle between the third lower extension arm 23 and the first lower extension arm 21 are equal. In the magnetically integrated inverter inductor described in this embodiment, a first core column 31 is provided between the other end of the first upper extension arm 11 and the other end of the first lower extension arm 21; a second core column 32 is provided between the other end of the second upper extension arm 12 and the other end of the second lower extension arm 22; a third core column 33 is provided between the other end of the third upper extension arm 13 and the other end of the third lower extension arm 23; and the first core column 31, the second core column 32 and the third core column 33 are respectively wound with a coil 4.

[0031] Specifically, the magnetic integrated inverter inductor described in this embodiment is provided with a first upper extension arm 11, a second upper extension arm 12 and a third upper extension arm 13 connected to each other, and a first lower extension arm 21, a second lower extension arm 22 and a third lower extension arm 23 connected to each other. The magnetic line simulation diagram is shown as follows: Figure 4 As shown, it can be seen that the magnetic induction on the first core column 31, the second core column 32 and the third core column 33 is the same, and the length of the magnetic path of each path is the same, so that the inductance of the three core columns is evenly distributed, and three-phase balance is achieved; and the dimensions of the first core column 31, the second core column 32 and the third core column 33 are all the same, the dimensions of the first upper extension arm 11, the second upper extension arm 12 and the third upper extension arm 13 are all the same, and the dimensions of the first lower extension arm 21, the second lower extension arm 22 and the third lower extension arm 23 are all the same, so that the heat dissipation of each winding coil 4 is also very uniform, and there is no situation where the heat dissipation of a winding coil 4 is poor.

[0032] This embodiment only requires three core columns. By integrating three independent inductors into an overall combined inductor, the material cost, weight and required installation space are significantly reduced, making the photovoltaic inverter more compact, miniaturized and lightweight. At the same time, the design of the combined inductor simplifies the manufacturing and assembly process, reduces material and labor costs, and thus reduces the cost of the overall system. In addition, the combined inductor design optimizes the electromagnetic characteristics, reduces electromagnetic interference and energy loss, and improves the power conversion efficiency and system reliability.

[0033] In the magnetically integrated inverter inductor described in this embodiment, the upper iron yoke 1 is arranged parallel to the lower iron yoke 2; the first core leg 31 is arranged perpendicular to the upper iron yoke 1; and the first core leg 31, the second core leg 32, and the third core leg 33 are arranged in parallel. Specifically, the above arrangement makes the overall structure more stable and reliable. The top of the first core leg 31, the top of the second core leg 32, and the top of the third core leg 33 can be connected to the upper iron yoke 1 by glue; the bottom of the first core leg 31, the bottom of the second core leg 32, and the bottom of the third core leg 33 can be connected to the lower iron yoke 2 by glue.

[0034] In the magnetically integrated inverter inductor described in this embodiment, the first core leg 31, the second core leg 32, and the third core leg 33 are made of a metal magnetic powder core. The metal magnetic powder core is made of iron-silicon alloy powder, iron-silicon-aluminum alloy powder, iron-nickel alloy powder, amorphous powder, and / or nanocrystalline powder. This configuration further enhances the performance of the magnetically integrated inverter inductor.

[0035] In the magnetically integrated inverter inductor described in this embodiment, the coil 4 is made of copper and / or aluminum. Through the above configuration, the performance of the magnetically integrated inverter inductor can be further enhanced.

[0036] In the magnetically integrated inverter inductor described in this embodiment, the cross-sectional shapes of the first core leg 31 , the second core leg 32 , and the third core leg 33 are circular, square, racetrack, triangular, or elliptical.

[0037] In the magnetically integrated inverter inductor described in this embodiment, a middle core column 5 is provided between the connection between the first upper extension arm 11, the second upper extension arm 12 and the third upper extension arm 13 and the connection between the first lower extension arm 21, the second lower extension arm 22 and the third lower extension arm 23.

[0038] Specifically, since each winding coil 4 is an inverter inductor, and since the current phase difference of the three winding coils 4 is 120°, the magnetic circuit is basically offset in the middle core column 5, so the middle core column 5 only needs a column with a very small cross-sectional area; considering that there are some special cases where the phase difference of the three-phase current is not 120°, the middle magnetic column is retained as a common column in special cases to increase the stability of the overall structure, and the actual cross-sectional size of the middle core column 5 can be much smaller than the sizes of the first core column 31, the second core column 32 and the third core column 33.

[0039] In the magnetically integrated inverter inductor described in this embodiment, the middle core column 5 is made of iron-based amorphous ribbon, iron-based nanocrystalline ribbon, manganese-zinc ferrite or silicon steel alloy.

[0040] Specifically, middle leg 5 is made of a material with high magnetic permeability and low magnetic resistance, such as iron-based amorphous ribbon, iron-based nanocrystalline ribbon, manganese-zinc ferrite, or silicon-steel alloy. The low-permeability first, second, and third legs 31, 32, 33 store energy, while the high-permeability middle leg 5 provides conjugation and decoupling, and exhibits common-mode suppression. This eliminates the need for external common-mode inductors, further reducing space and costs.

[0041] In the magnetically integrated inverter inductor described in this embodiment, the cross-sectional shape of the middle core column 5 is circular, square, racetrack, elliptical, triangular, or annular.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A magnetically integrated inverter inductor, characterized in that: It includes an upper iron yoke and a lower iron yoke; The upper iron yoke is provided with a first upper extension arm, a second upper extension arm and a third upper extension arm of the same length on the same plane; one end of the first upper extension arm, one end of the second upper extension arm and one end of the first upper extension arm are connected to each other; the angle between the first upper extension arm and the second upper extension arm, the angle between the second upper extension arm and the third upper extension arm, and the angle between the third upper extension arm and the first upper extension arm are equal; The lower iron yoke is provided with a first lower extension arm, a second lower extension arm and a third lower extension arm of the same length in the same plane; one end of the first lower extension arm, one end of the second lower extension arm and one end of the first lower extension arm are connected to each other; the angle between the first lower extension arm and the second lower extension arm, the angle between the second lower extension arm and the third lower extension arm, and the angle between the third lower extension arm and the first lower extension arm are equal.

2. The magnetically integrated inverter inductor according to claim 1, characterized in that: A first core column is provided between the other end of the first upper extension arm and the other end of the first lower extension arm; a second core column is provided between the other end of the second upper extension arm and the other end of the second lower extension arm; a third core column is provided between the other end of the third upper extension arm and the other end of the third lower extension arm; The first core column, the second core column and the third core column are respectively wound with coils.

3. The magnetically integrated inverter inductor according to claim 2, characterized in that: The upper iron yoke is arranged in parallel with the lower iron yoke; the first core column is arranged perpendicular to the upper iron yoke; the first core column, the second core column and the third core column are arranged in parallel.

4. The magnetically integrated inverter inductor according to claim 2, characterized in that: The first core column, the second core column and the third core column are made of metal magnetic powder cores.

5. The magnetically integrated inverter inductor according to claim 2, characterized in that: The coil is made of copper and / or aluminum.

6. The magnetically integrated inverter inductor according to claim 2, characterized in that: The cross-sectional shape of the first core column, the cross-sectional shape of the second core column and the cross-sectional shape of the third core column are circular, square, triangular or elliptical.

7. The magnetically integrated inverter inductor according to claim 2, characterized in that: A middle core column is provided between the connection point of the first upper extension arm, the second upper extension arm and the third upper extension arm and the connection point of the first lower extension arm, the second lower extension arm and the third lower extension arm.

8. The magnetically integrated inverter inductor according to claim 7, characterized in that: The middle core column is made of iron-based amorphous strip, iron-based nanocrystalline strip, manganese-zinc ferrite or silicon steel alloy.

9. The magnetically integrated inverter inductor according to claim 7, characterized in that: The cross-sectional shape of the central core column is circular, square, elliptical, triangular or annular.

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